CN201114497Y - Audio and video signal automatic multi-optional device - Google Patents
Audio and video signal automatic multi-optional device Download PDFInfo
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- CN201114497Y CN201114497Y CNU200720098682XU CN200720098682U CN201114497Y CN 201114497 Y CN201114497 Y CN 201114497Y CN U200720098682X U CNU200720098682X U CN U200720098682XU CN 200720098682 U CN200720098682 U CN 200720098682U CN 201114497 Y CN201114497 Y CN 201114497Y
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Abstract
The utility model relates to an auxiliary device for an audio and video terminal unit, in particular to an automatic multi-choice device for audio and video signals. The device comprises a plurality of groups of audio and video input interfaces, an electronic switch, a synchronous separator, a rectifier, a filter, an amplifier, a buffer, an impedance matcher and a group of audio and video output interfaces, wherein, two groups of audio and video input interfaces are respectively connected with the input end of the electronic switch; a video input interface of the second group is connected with the input end of the electronic switch by the synchronous separator, the rectifier and the filter; an output end of the electronic switch is connected with the video output interfaces by the amplifier, the buffer and the impedance matcher; the other two output ends of the electronic switch are respectively connected with the interfaces of an audio right channel and the interface of an audio left channel by the buffer and the impedance matcher. The device solves the wiring problem of a plurality of audio and video equipment and terminal units, which is economical and practical and can be widely applied to digital TV set-top-box, the conversion of TV signals, video monitoring and automatic test, etc.
Description
Technical field
The utility model relates to the auxiliary equipment of audio-video terminal equipment, the automatic multiselect device of particularly a kind of audio-video signal.
Background technology
Fast development along with electronics technology, the particularly quickening of television digitization step, had increasing audio ﹠ video equipment (for example video tape recorder, video disc player, set-top box, video camera, digital camera and MP4 etc.) to enter in the user family, these equipment all may be by audio and video output interface and identical terminal equipment (for example television set) connection.And the audio frequency and video input interface limited amount of terminal equipment (for example television set), early the television set of model only has 1 group of audio frequency and video input interface, this just uses new equipment to bring worry to the user, common solution is exactly in use will be inserted in connecting line on a certain equipment (for example video disc player) originally to pull up and be inserted on the equipment (for example set-top box) that will use again, and gains after using up at once again.
Summary of the invention
The utility model is in order to solve the problem that above-mentioned prior art exists, and the spy provides a kind of audio-video signal automatic multiselect device.Use this device, the user can oneself define the priority of various audio ﹠ video equipments, successively connecting line is inserted then, does not just need to have plugged connecting line more later on.Which equipment the user wants to use, and only need open that device power supply (DPS), and the sound of this equipment output and image will appear at terminal equipment (for example television set) and suffer.
The utility model is that the technical scheme of being taked that achieves the above object is: the automatic multiselect device of a kind of audio-video signal, it is characterized in that, comprise two groups of audio frequency and video input interfaces: be respectively two video input interfaces, two audio frequency L channel input interfaces and two audio frequency R channel input interfaces, also comprise an electronic switch, a sync separator, a rectifier, a filter, an amplifier, three buffers, three impedance matching boxs and one group of audio and video output interface: video output interface, audio frequency L channel output interface, audio frequency R channel output interface; Wherein two groups of audio frequency and video input interfaces are connected with the input of electronic switch respectively: wherein a video input interface of the 2nd group is connected with the input of electronic switch by sync separator, rectifier, filter again; An output of electronic switch is connected with video output interface by amplifier, buffer, impedance matching box; Two other output of electronic switch is connected with audio frequency R channel output interface with audio frequency L channel output interface by buffer, impedance matching box respectively.
The beneficial effect that the utility model produces is: solved the line problem of many audio ﹠ video equipments and terminal equipment, it is economical and practical, can be widely used in digital TV set-top box, TV signal conversion, video monitoring and tests automatically etc.
Description of drawings
Fig. 1 is the catenation principle block diagram of the utility model embodiment 1 and as Figure of abstract.
Fig. 2 is the catenation principle block diagram of the utility model embodiment 2.
Fig. 3 is the catenation principle block diagram of the utility model embodiment 3.
Fig. 4 is the catenation principle block diagram of the utility model embodiment 4.
Fig. 5 is the catenation principle block diagram of the utility model embodiment 5.
Fig. 6 is the catenation principle block diagram of the utility model embodiment 6.
Embodiment
Embodiment 1: with reference to Fig. 1, present embodiment is to have two groups of audio frequency and video inputs, the device of one group of audio frequency and video output, this device comprises two groups of audio frequency and video input interfaces: the 1st group is video input interface 1A, audio frequency L channel input interface 2A and audio frequency R channel input interface 3A, the 2nd group is video input interface 1B, audio frequency L channel input interface 2B and audio frequency R channel input interface 3B, also comprise an electronic switch 4A, a sync separator 5A, a rectifier 6A, a filter 7A, an amplifier 8, three buffer 9A, 9B, 9C, three impedance matching box 10A, 10B, 10C and one group of audio and video output interface: video output interface 13, audio frequency L channel output interface 14, audio frequency R channel output interface 15; Wherein two groups of audio frequency and video input interface 1A, 2A, 3A and 1B, 2B, 3B are connected with the input of electronic switch 4A respectively: wherein a video input interface 1B of the 2nd group is connected with the input of electronic switch 4A by sync separator 5A, rectifier 6A, filter 7A again; The output of electronic switch 4A is connected with video output interface 13 by amplifier 8, buffer 9A, impedance matching box 10A; Two other output of electronic switch 4A is connected with audio frequency R channel output interface 15 with audio frequency L channel output interface 14 by buffer 9B, 9C, impedance matching box 10B, 10C respectively.
Be connected to the input of electronic switch 4A from 2 groups of AV signal of other equipment by 2 groups of input interfaces, the vision signal in the 2nd group of AV signal enters sync separator 5A, rectifier 6A and filter 7A simultaneously.When vision signal was imported, sync separator 5A can separate the synchronizing signal in the vision signal.Deliver to the control end of electronic switch 4A through DC level of rectifier 6A and filter 7A output as control signal, under the control of this control signal, select 2 groups of 1 group of outputs in the input.
After the selection through electronic switch 4A, enter amplifier 8 from the vision signal of electronic switch 4A output and amplify, isolate, after entering impedance matching box 10A again and carrying out impedance matching, by video output interface 13 outputs through buffer 9A.
Enter buffer 9B, 9C respectively from the audio frequency L channel of electronic switch 4A output and audio frequency right-channel signals and isolate, after entering impedance matching box 10B, 10C again and carrying out impedance matching, by audio frequency L channel output interface 14 and 15 outputs of audio frequency R channel output interface.
Embodiment 2: with reference to Fig. 2, present embodiment is to increase a radio frequency output on the device of embodiment 1, and the device of this device and embodiment 1 has identical 2 groups of audio frequency and video input and 1 group of audio frequency and video output, is not repeated in this description at this.Different is this device also a comprises hilted broadsword is two puts switch 11, a modulator 12 and a radio frequency output interface 16, the output of described electronic switch 4A also is connected with modulator 12, two other output of electronic switch 4A is also put switch 11 and is connected with modulator 12 by hilted broadsword is two respectively, and modulator 12 is connected with radio frequency output interface 16.
Also put switch 11 and link to each other from the audio frequency L channel of electronic switch 4A output and audio frequency right-channel signals with 1 hilted broadsword is two, select L channel or right-channel signals to enter modulator 12 by the two switches 11 of putting of hilted broadsword, as the audio signal input signal of modulator 12, the vision signal from electronic switch 4A output also is connected to modulator 12 simultaneously.After the audio signal of 12 inputs of modulator and vision signal are modulated to radio frequency, from radio frequency output interface 16 outputs.
Embodiment 3: with reference to Fig. 3, present embodiment is to have 3 groups of audio frequency and video inputs, the device of one group of audio frequency and video output, this device comprises 3 groups of audio frequency and video input interfaces: the 1st group is video input interface 1A, audio frequency L channel input interface 2A and audio frequency R channel input interface 3A, the 2nd group is video input interface 1B, audio frequency L channel input interface 2B and audio frequency R channel input interface 3B, the 3rd group is video input interface 1C, audio frequency L channel input interface 2C and audio frequency R channel input interface 3C, also comprise two electronic switch 4A, 4B, two sync separator 5A, 5B, two rectifier 6A, 6B, two filter 7A, 7B, an amplifier 8, three buffer 9A, 9B, 9C, three impedance matching box 10A, 10B, 10C and one group of audio and video output interface: video output interface 13, audio frequency L channel output interface 14, audio frequency R channel output interface 15; Wherein two groups of audio frequency and video input interface 1A, 2A, 3A and 1B, 2B, 3B are connected with the input of electronic switch 4A respectively: wherein a video input interface 1B of the 2nd group is connected with the input of electronic switch 4A by sync separator 5A, rectifier 6A, filter 7A again; Three outputs of the 3rd group of audio frequency and video input interface 1C, 2C, 3C and electronic switch 4A are connected with the input of electronic switch 4B respectively; Wherein a video input interface 1C of the 3rd group is connected with the input of electronic switch 4B by sync separator 5B, rectifier 6B, filter 7B; The output of electronic switch 4B is connected with video output interface 13 by amplifier 8, buffer 9A, impedance matching box 10A; Two other output of electronic switch 4B is connected with audio frequency R channel output interface 15 with audio frequency L channel output interface 14 by buffer 9B, 9C, impedance matching box 10B, 10C respectively.
Be connected to the input of 2 electronic switch 4A, 4B from 3 groups of AV signal of other equipment by 3 groups of input interfaces, the vision signal in the 2nd group and the 3rd group of AV signal enters sync separator 5A, 5B, rectifier 6A, 6B and filter 7A, 7B simultaneously respectively.When vision signal was imported, sync separator 5A, 5B can separate the synchronizing signal in the vision signal.Deliver to the control end of electronic switch 4A, 4B through rectifier 6A, 6B and DC level of filter 7A, 7B output respectively as control signal, under the control of this control signal, select 3 groups of 1 group of outputs in the input.
After selecting through 2 electronic switch 4A, 4B 2 times, enter amplifier 8 from the vision signal of last 1 electronic switch 4B output and amplify, isolate, after entering impedance matching box 10A again and carrying out impedance matching, by video output interface 13 outputs through buffer 9A.
Enter buffer 9B, 9C isolation respectively from the audio frequency L channel and the audio frequency right-channel signals of last 1 electronic switch 4B output, after entering impedance matching box 10A, 10B again and carrying out impedance matching, by audio frequency L channel output interface 14 and 15 outputs of audio frequency R channel output interface.
Embodiment 4: with reference to Fig. 4, present embodiment is to increase a radio frequency output on the device of embodiment 3, and the device of this device and embodiment 3 has identical 3 groups of audio frequency and video input and 1 group of audio frequency and video output, is not repeated in this description at this.Different is this device also a comprises hilted broadsword is two puts switch 11, a modulator 12 and a radio frequency output interface 16, the output of described electronic switch 4B also is connected with modulationmodulator 12, two other output of electronic switch 4B is also put switch 11 and is connected with modulator 12 by hilted broadsword is two respectively, and modulator 12 is connected with radio frequency output interface 16.
Also put switch 11 and link to each other from the audio frequency L channel of last 1 electronic switch 4B output and audio frequency right-channel signals with 1 hilted broadsword is two, select L channel or right-channel signals to enter modulator 12 by the two switches 11 of putting of hilted broadsword, as the audio signal input signal of modulator 12, the vision signal from last 1 electronic switch 4B output also is connected to modulator 12 simultaneously.After the audio signal of 12 inputs of modulator and vision signal are modulated to radio frequency, from radio frequency output interface 16 outputs.
Embodiment 5: with reference to Fig. 5, present embodiment is to have 4 groups of audio frequency and video inputs, the device of one group of audio frequency and video output, this device comprises 4 groups of audio frequency and video input interfaces: the 1st group is video input interface 1A, audio frequency L channel input interface 2A and audio frequency R channel input interface 3A, the 2nd group is video input interface 1B, audio frequency L channel input interface 2B and audio frequency R channel input interface 3B, the 3rd group is video input interface 1C, audio frequency L channel input interface 2C and audio frequency R channel input interface 3C, the 4th group is video input interface 1D, audio frequency L channel input interface 2D and audio frequency R channel input interface 3D, also comprise three electronic switch 4A, 4B, 4C, three sync separator 5A, 5B, 5C, three rectifier 6A, 6B, 6C, three filter 7A, 7B, 7C, an amplifier 8, three buffer 9A, 9B, 9C, three impedance matching box 10A, 10B, 10C and one group of audio and video output interface: video output interface 13, audio frequency L channel output interface 14, audio frequency R channel output interface 15; Wherein two groups of audio frequency and video input interface 1A, 2A, 3A and 1B, 2B, 3B are connected with the input of electronic switch 4A respectively: wherein a video input interface 1B of the 2nd group is connected with the input of electronic switch 4A by sync separator 5A, rectifier 6A, filter 7A again; The 3rd group of audio frequency and video input interface 1C, three outputs of 2C, 3C and electronic switch 4A are connected with the input of electronic switch 4B respectively; Wherein a video input interface 1C of the 3rd group is connected with the input of electronic switch 4B by sync separator 5B, rectifier 6B, filter 7B; Three outputs of the 4th group of audio frequency and video input interface 1D, 2D, 3D and electronic switch 4B are connected with the input of electronic switch 4C; Wherein a video input interface 1D of the 4th group is connected with the input of electronic switch 4C by sync separator 5C, rectifier 6C, filter 7C, and the output of electronic switch 4C is connected with video output interface 13 by amplifier 8, buffer 9A, impedance matching box 10A; Two other output of electronic switch 4C is connected with audio frequency R channel output interface 15 with audio frequency L channel output interface 14 by buffer 9B, 9C, impedance matching box 10B, 10C respectively.
Be connected to the input of 3 electronic switch 4A, 4B, 4C from 4 groups of AV signal of other equipment by 4 groups of input interfaces, the vision signal in the 2nd group, the 3rd group and the 4th group of AV signal enters sync separator 5A, 5B, 5C, rectifier 6A, 6B, 6C and filter 7A, 7B, 7C simultaneously respectively.When vision signal was imported, sync separator 5A, 5B, 5C can separate the synchronizing signal in the vision signal.Deliver to the control end of electronic switch 4A, 4B, 4C through rectifier 6A, 6B, 6C and filter 7A, 7B, DC level of 7C output respectively as control signal, under the control of this control signal, select 4 groups of 1 group of outputs in the input.
After 3 selections through 3 electronic switch 4A, 4B, 4C, entering amplifier 8 from the vision signal of last 1 electronic switch 4C output amplifies, isolate through buffer 9A, after entering impedance matching box 10A again and carrying out impedance matching, by video output interface 13 outputs.
Enter buffer 9B, 9C isolation respectively from the audio frequency L channel and the audio frequency right-channel signals of last 1 electronic switch 4C output, after entering impedance matching box 10B, 10C again and carrying out impedance matching, by audio frequency L channel output interface 14 and 15 outputs of audio frequency R channel output interface.
Embodiment 6: with reference to Fig. 6, present embodiment is to increase a radio frequency output on the device of embodiment 5, and the device of this device and embodiment 5 has identical 4 groups of audio frequency and video input and 1 group of audio frequency and video output, is not repeated in this description at this.Different is this device also a comprises hilted broadsword is two puts switch 11, a modulator 12 and a radio frequency output interface 16, the output of described electronic switch 4C also is connected with modulationmodulator 12, two other output of electronic switch 4C is also put switch 11 and is connected with modulator 12 by hilted broadsword is two respectively, and modulator 12 is connected with radio frequency output interface 16.
Also put switch 11 and link to each other from the audio frequency L channel of last 1 electronic switch 4C output and audio frequency right-channel signals with 1 hilted broadsword is two, select L channel or right-channel signals to enter modulator 12 by the two switches 11 of putting of hilted broadsword, as the audio signal input signal of modulator 12, the vision signal from last 1 electronic switch 4C output also is connected to modulator 12 simultaneously.After the audio signal of 12 inputs of modulator and vision signal are modulated to radio frequency, from radio frequency output interface 16 outputs.
In above-mentioned 6 embodiment, though only be given to the example of 4 groups of audio frequency and video inputs at most,, design 4 groups of above automatic multiselect devices of audio frequency and video input signal and be easy to realize according to design philosophy of the present utility model, illustrate no longer one by one at this.
The power supply of this device is to enter system by DC power supply voltage by power input terminal, and by being switched on or switched off of switch control power supply, DC power supply can be power supply adaptor (AC-DC converter), also can be the DC power supply of other form.
Claims (6)
1, the automatic multiselect device of a kind of audio-video signal, it is characterized in that, comprise two groups of audio frequency and video input interfaces: the 1st group is video input interface (1A), audio frequency L channel input interface (2A) and audio frequency R channel input interface (3A), the 2nd group is video input interface (1B), audio frequency L channel input interface (2B) and audio frequency R channel input interface (3B), also comprise an electronic switch (4A), a sync separator (5A), a rectifier (6A), a filter (7A), an amplifier (8), three buffer (9A, 9B, 9C), three impedance matching box (10A, 10B, 10C) with one group of audio and video output interface: video output interface (13), audio frequency L channel output interface (14), audio frequency R channel output interface 15); Wherein two groups of audio frequency and video input interfaces (1A, 2A, 3A) are connected with the input of electronic switch (4A) respectively with (1B, 2B, 3B): wherein a video input interface (1B) of the 2nd group is connected with the input of electronic switch (4A) by sync separator (5A), rectifier (6A), filter (7A) again; An output of electronic switch (4A) is connected with video output interface (13) by amplifier (8), buffer (9A), impedance matching box (10A); Two other output of electronic switch (4A) respectively by buffer (9B) (9C), impedance matching box (10B) (10C) is connected with audio frequency R channel output interface (15) with audio frequency L channel output interface (14).
2, the automatic multiselect device of audio-video signal as claimed in claim 1, it is characterized in that, also comprise two switch (11), a modulator (12) and the radio frequency output interface (16) of putting of a hilted broadsword, an output of described electronic switch (4A) also is connected with modulator (12), two other output of electronic switch (4A) is also put switch (11) and is connected with modulator (12) by hilted broadsword is two respectively, and modulator (12) is connected with radio frequency output interface (16).
3, the automatic multiselect device of a kind of audio-video signal, it is characterized in that, comprise 3 groups of audio frequency and video input interfaces: the 1st group is video input interface (1A), audio frequency L channel input interface (2A), with audio frequency R channel input interface (3A), the 2nd group is video input interface (1B), audio frequency L channel input interface (2B), with audio frequency R channel input interface (3B), the 3rd group is video input interface (1C), audio frequency L channel input interface (2C), with audio frequency R channel input interface (3C), also comprise two electronic switch (4A, 4B), two sync separator (5A, 5B), two rectifier (6A, 6B), two filter (7A, 7B), an amplifier (8), three buffer (9A, 9B, 9C), three impedance matching box (10A, 10B, 10C) with one group of audio and video output interface: video output interface (13), audio frequency L channel output interface (14), audio frequency R channel output interface 15); Wherein two groups of audio frequency and video input interfaces (1A, 2A, 3A) are connected with the input of electronic switch (4A) respectively with (1B, 2B, 3B): wherein a video input interface (1B) of the 2nd group is connected with the input of electronic switch (4A) by sync separator (5A), rectifier (6A), filter (7A) again; Three outputs of the 3rd group of audio frequency and video input interface (1C, 2C, 3C) and electronic switch (4A) are connected with the input of electronic switch (4B) respectively; Wherein a video input interface (1C) of the 3rd group is connected with the input of electronic switch (4B) by sync separator (5B), rectifier (6B), filter (7B); An output of electronic switch (4B) is connected with video output interface (13) by amplifier (8), buffer (9A), impedance matching box (10A); Two other output of electronic switch (4B) respectively by buffer (9B) (9C), impedance matching box (10B) (10C) is connected with audio frequency R channel output interface (15) with audio frequency L channel output interface (14).
4, the automatic multiselect device of audio-video signal as claimed in claim 3, it is characterized in that, also comprise two switch (11), a modulator (12) and the radio frequency output interface (16) of putting of a hilted broadsword, an output of described electronic switch (4B) also is connected with modulationmodulator (12), two other output of electronic switch (4B) is also put switch (11) and is connected with modulator (12) by hilted broadsword is two respectively, and modulator (12) is connected with radio frequency output interface (16).
5, the automatic multiselect device of a kind of audio-video signal, it is characterized in that, comprise 4 groups of audio frequency and video input interfaces: the 1st group is video input interface (1A), audio frequency L channel input interface (2A), with audio frequency R channel input interface (3A), the 2nd group is video input interface (1B), audio frequency L channel input interface (2B), with audio frequency R channel input interface (3B), the 3rd group is video input interface (1C), audio frequency L channel input interface (2C), with audio frequency R channel input interface (3C), the 4th group is video input interface (1D), audio frequency L channel input interface (2D), with audio frequency R channel input interface (3D), also comprise three electronic switch (4A, 4B, 4C), three sync separator (5A, 5B, 5C), three rectifier (6A, 6B, 6C), three filter (7A, 7B, 7C), an amplifier (8), three buffer (9A, 9B, 9C), three impedance matching box (10A, 10B, 10C) with one group of audio and video output interface: video output interface (13), audio frequency L channel output interface (14), audio frequency R channel output interface 15); Wherein two groups of audio frequency and video input interfaces (1A, 2A, 3A) are connected with the input of electronic switch (4A) respectively with (1B, 2B, 3B): wherein a video input interface (1B) of the 2nd group is connected with the input of electronic switch (4A) by sync separator (5A), rectifier (6A), filter (7A) again; Three outputs of the 3rd group of audio frequency and video input interface (1C, 2C, 3C) and electronic switch (4A) are connected with the input of electronic switch (4B) respectively; Wherein a video input interface (1C) of the 3rd group is connected with the input of electronic switch (4B) by sync separator (5B), rectifier (6B), filter (7B); Three outputs of the 4th group of audio frequency and video input interface (1D, 2D, 3D) and electronic switch (4B) are connected with the input of electronic switch (4C); Wherein a video input interface (1D) of the 4th group is connected with the input of electronic switch (4C) by sync separator (5C), rectifier (6C), filter (7C), and an output of electronic switch (4C) is connected with video output interface (13) by amplifier (8), buffer (9A), impedance matching box (10A); Two other output of electronic switch (4C) respectively by buffer (9B) (9C), impedance matching box (10B) (10C) is connected with audio frequency R channel output interface (15) with audio frequency L channel output interface (14).
6, the automatic multiselect device of audio-video signal as claimed in claim 5, it is characterized in that, also comprise two switch (11), a modulator (12) and the radio frequency output interface (16) of putting of a hilted broadsword, an output of described electronic switch (4C) also is connected with modulationmodulator (12), two other output of electronic switch (4C) is also put switch (11) and is connected with modulator (12) by hilted broadsword is two respectively, and modulator (12) is connected with radio frequency output interface (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200720098682XU CN201114497Y (en) | 2007-09-28 | 2007-09-28 | Audio and video signal automatic multi-optional device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200720098682XU CN201114497Y (en) | 2007-09-28 | 2007-09-28 | Audio and video signal automatic multi-optional device |
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| CNU200720098682XU Expired - Fee Related CN201114497Y (en) | 2007-09-28 | 2007-09-28 | Audio and video signal automatic multi-optional device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103417205A (en) * | 2012-05-23 | 2013-12-04 | 中国科学院电子学研究所 | Neural information detecting system |
| CN109254753A (en) * | 2018-09-27 | 2019-01-22 | 京东方科技集团股份有限公司 | Audio signal interface circuit and its device, control method, playback equipment |
-
2007
- 2007-09-28 CN CNU200720098682XU patent/CN201114497Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103417205A (en) * | 2012-05-23 | 2013-12-04 | 中国科学院电子学研究所 | Neural information detecting system |
| CN103417205B (en) * | 2012-05-23 | 2015-05-06 | 中国科学院电子学研究所 | Neural information detecting system |
| CN109254753A (en) * | 2018-09-27 | 2019-01-22 | 京东方科技集团股份有限公司 | Audio signal interface circuit and its device, control method, playback equipment |
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